Organosilicon compounds

ABSTRACT

Organosilicon compounds of the formula   where X is a hydrolyzable group and Y and Y&#39;&#39; are each a hydrolyzable group or a hydrocarbon, prepared by reaction of a silane   with an alkenyl ether of a nitrophenol.

United States Patent 11 1 Meiller I ()RGANOSILICON COMPOUNDS [75] Inventor: Francois Meiller. Palaiseau. France [73] Assignee: Rhone-Progil. Courhevoie. France [22] Filed: Apr. [5. I974 [21 App]. No.: 460.826

[30] Foreign Application Priority Data Apr. l7. 1973 France 73.13881 [52] U.S. CL... 260/4482 N; l06/287 SB: 260/465 E; 260/4482 E; 260/4488 R OTHER PUBLICATIONS Noll. Chemistry and Technology of Silicones." 2nd Aug. 5, 1975 Ed.. Academic Press. N.Y. (i968). p. 81.

Primary Eraminer-Paul F. Shaver [57! ABSTRACT Organosilicon compounds of the formula where X is a hydrolyzable group and Y and Y are each a hydrolyzable group or a hydrocarbon, prepared by reaction of a silane with an alkenyl ether of a nitrophenol.

4 Claims, No Drawings 1 ()RGANOSILICON COMPOUNDS wherein n is a whole number from 2 to 4,

X represents a chlorineatom or a straight or branched alkoxy group with l to 8 carbon atoms, and

Y and Y, which may be similar or different, represent 'a chlorine atom, a methyl, ethyl or phenyl group or a straight or branched alkoxy group with l to 8 carbon atoms.

The compounds according to the invention, derived from nitrophenols, are in the form of liquids or solids, most of which can be distilled.

The method of preparing the silicon compounds derivedfrom nitrophenols is to react a silane of the formula:

wherein X, Y and Y have the same meaning as above,

with an alkenyl ether of ortho, meta or paranitrophenol, in the presence of a chloroplatinic or peroxide catalyst at a temperature of from 50 to 120C.

Silanes which may be reacted include methyldichlorosilane. dimethylchlorosilane, trichlorosilane, methylphcnylchlorosilane, methyldimethoxysilane, dimethylmethoxysilane, trimethoxysilane. diethylchlorosilane, dimethylethoxysilane, phenyldiethoxysilane, dimethylethylbutoxysilane and dimethylethylhexoxysilanc.

The alkylene ethers of nitrophenol which can be used are represented by the allyl, vinyl and y-butenyl ethers of ortho, meta and para-nitrophenols.

The silane is used in stoichiometrie proportions relative to the ether and preferably slightly in excess, up to The catalyst required for carrying out the process of the invention is represented either by chloroplatinic acid of alternatively an alkali metal.chloroplatinatc. or by an organic peroxide suchas diacetyl peroxide. ben- Zoyl peroxide or tertiobutyl perbenzoate. Theguantities of catalyst used are ofthe-onder-of l to ll) and preferably 2 to ppm by weight of platinum relative to the et he'rlfor the chloroplatinic derivatives and O. l to 0.5%

although one can operate at autogenous pressure depending on the reactivity of the materials. The reaction takes l to 8 hours'and the reaction temperature is from 50 to 120C. As the reaction is generally exothermic, it is often necessary to cool the reaction mixture or to introduce one of the materials involved in the reaction continuously or in successive portions, in order to maintain that temperature:

The silicon compound thus formed, derived from nitrophenol, is then separated; the materials which have not reacted and any light materials which have formed during the reaction are eliminated and the silicon compound is distilled or crystallized. The. yield is generally over by weight. v

In a modification of the method of the invention, silicon compounds derived from nitrophenols where the silicon atom carries 1 to 3 alkoxy groups may be prepared from silicon compounds derived from the corre sponding nitrophenols where the silicon atom carries 1 to 3 chlorine atoms. These are reacted with a straight or branched alcohol with 1 tot; carbon atoms, the alcoholbeing slightly in excess of the stoichiometric quantity, possibly up to 10% by weight, Thereaction is carried out in the presence of an HCl acceptor such as pyridine, diethylaniline ordiethylamin'e in stoichiometric proportions relative to the quantity of chlorine atoms in the silicon compound.

In order to facilitate the reaction, it is necessary for the reaction medium to be sufficiently fluid. Hence a diluent is added, which can dissolve the materials being reacted and the compound to be obtained but will not dissolve the amine hydrochloride formed. Examples are benzene, toluene, heptane and octane.

Since the reaction is extremely exothermic, the reaction medium is kept below 10C, and the alcohol is added to it continuously or in successive portions; when all the alcohol has been added, the medium is brought to a boil. When the medium has cooled, the hydrochloride formed is separated by filtration and the silicon compound is obtained after distillation of the solvent and distillation or crystallization of the product.

The silicon compounds according to the invention, derived from nitrophenols, can be used as intermediate products in synthesizing, particularly in color chemistry or in the preparation of polymers and copolymers by hydrolyzing the said compounds. The copolymers are obtained by copolymerizing a compound according to the invention with another of these compounds or with aconventional difunctional silane, possibly in the presence of a conventional chain limiter or of a monofunctional compound according to the invention, and can be used as protective coatings.

Having described the basic concepts of the invention, reference is now made to the following examples which are provided by way of illustration, and not of limitation, of the practice of the invention.

EXAMPLE l l79 g of; allyl ether of para-nitrophenol and 5 ppm of chloroplatinic. acid areplaeed in a flask equipped with an agitator. ,The reaction mixture is brought to C; then g of di rne- 'thylchlorosilane is added dropwise. When this has been done, the temperature is maintained at ll()C for hours and then the product is distilled. 250 g (a yield of 91%) is obtained of a compound of the formula lts boiling point is l78C/0.2mm Hg and its structure is confirmed by NMR spectroscopy.

EXAMPLE 2 Example 1 is repeated, but with the dimethylchlorosilane replaced by 125 g of methyldichlorosilane.

This gives 260 g of a compound with a boiling point of l77-l78C 0.5 mm Hg. LR. and NMR spectroscopy confirm its structure as EXAMPLE 3 The same procedure as in Example I is followed. but with 150 g of trichlorosilane instead of the dimethylchlorosilane.

This gives 280 g of a compound of the formula Cl No2 lowish oil was obtained. LR. and NMR spectroscopy confirmed its structure as being EXAMPLE 5 its boiling point is lC/0.02 mm Hg and its structure is confirmed by NMR spectroscopy.

EXAMPLES 6, 7 and 8 Examples 1, 2 and 3 are repeated with the allyl ether of para-nitrophenol replaced by allyl ether of orthonitrophenol. The results obtained are set out in Table l below.

It has a boiling point of l-l67C 0.1 mm Hg and its structure is confirmed by IR. and NMR spectroscopy.

EXAMPLE 4 As in Example 1. there was heated to 90C l8 g of allyl ether of para-nitrophenol and 5 ppm of chloroplatinie acid. then added dropwise 17 g of methylphenylchlorosilane.

After 2 hours at l I()C. 28 g (a yield of7r ofa yel- EXAMPLES 9 to 14 The chlorosilanes of Examples 1. 2. 3. 6. 7 and 8 are dissolved in proportions ofone mole in 500 cm" of henzene. The solutions are cooled in ice and stoichiometric quantities plus-10% of methanol dissolved in pyridine in a quantity corresponding to the atoms of chlorine are added dropwisc. When thishas been done. the medium is heated to the boiling point for 2 hours.-

3 48 98,255 5 6 The pyridine hydrochloride formed is filtered under EXAMPLE l7 vacuum and the benzene is distilled. The formulae (confirmed by LR. and NMR spectroscopy), boiling points and yield of the products obtained are indicated in Table ll.

When hydrolyzed, the compounds of Examples 2, l0, 7 and 13 give a polymer made up of chain of monomeric units of the formula:

EXAMPLE 15 Example 9 is repeated with the methanol replaced by ethyl-2-butanol. A yield is obtained of a compound with a boiling point of l8()C/().5 mm Hg. IR. 10 and NMR spectroscopy confirm its structure as being EXAMPLE l6 EXAMPLE 18 The compounds of Examples 1,9, 6 and 12, dissolved When the compounds of Examples 3, l l, 8 and 14 in ether and then hydrolyzed with ice water, yield diare hydrolyzed, they give a cross-linked polymer which mcrs of the structure 30 is made up of monomeric units of the formula for compounds 1 and 9, and of the structure 2 N0 It will be understood that various changes and modifications can be made in the details of formulation, profor compounds 6 and 12. The foregoing products are cedure and use without departing from the spirit of the oily compounds having a specific gravity in excess of l invention, especially as defined in the following claims.

TABLE II Boiling Point Yield Examples Compounds obtained Clmm Hg and/or 7:

melting point CH 9 NO @O(CH S iOCH l56lS8/O.5

at. OCH ll) N() ,@O(CH );,S iCH l72l76/O.l 91

2x, OCH ll NO O(CH lnS iOCH;, Bp 178/01 Mp 540C 93 OCH;, Mo

CH 2 ()-(CH. si ocii /0.4 85

OCH 1} ()(CH- iCH l5()/().25 85 (SCH,

()CHn 1-1 -()-(CH -Si--OCH; l5ll53/(l.l 8)

l claim: 1. Silicon compounds having the formula wherein n is a whole number from 2 to 4, X represents a chlorine atom or a straight or branched alkoxy group with l to 8 carbon atoms, and Y and Y. which may be similar or different from one another, are each selected from the group consisting of a chlorine atom, a methyl group, an ethyl group, a phenyl group and a straight or branched alkoxy group with l to 8 carbon atoms. 

1. SILICON COMPOUNDS HAVING THE FORMULA
 2. Polymers and copolymers of the silicon compounds derived from nitrophenols according to claim 1, prepared by hydrolyzing the said compounds, alone or with a functional silane selected from the group consisting of a difunctional silane and a monofunctional silane.
 3. Silicon compounds as defined in claim 1 wherein n is
 3. 4. Homopolymers of silicon compounds derived from nitrophenols prepared By hydrolyzing compounds as defined in claim
 1. 